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Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Held-to-Maturity Securities

						Gross				Gross
						unrealized				unrealized
		Amortized				holding				holding				Aggregate
		cost basis**				gains				(losses)				fair value*
		US$ thousands
At December 31, 2022
Held to maturity:
Corporate debt securities and government debt securities
Current			4,038				-				(111	)			3,927
Non-Current (1 to 3 years)			15,283				-				(1,214	)			14,069

			19,321				-				(1,325	)			17,996

At December 31, 2021
Held to maturity:
Corporate debt securities and government debt securities
Current			8,300				43				(19	)			8,324
Non-Current (1 to 4 years)			23,966				10				(512	)			23,464

			32,266				53				(531	)			31,788

*	Fair value is being determined using Level 2 inputs.
**	Including accrued interest in the amount of US$ 227 thousand and US$ 138 thousand as of December 31, 2021 and 2022, respectively.

	The accrued interest is presented as part of other receivables on the balance sheet.

Schedule of Reconciliation of Marketable Securities

Activity in marketable securities in 2022		US$ thousands

Balance at January 1, 2021			50,810

Purchases of marketable securities			19,927
Changes in marketable securities, net			(621	)
Proceeds from maturity of marketable securities			(37,850	)

Balance at January 1, 2022			32,266

Purchases of marketable securities			3,998
Changes in marketable securities, net			(914	)
Proceeds from maturity of marketable securities			(16,029	)

Balance at December 31, 2022			19,321

Schedule of Investment Securities in an Unrealized Loss Position

		Less than 12 months								12 months or more								Total
		Unrealized Losses				Fair value				Unrealized Losses				Fair value				Unrealized Losses				Fair value
Held to maturity:

Corporate debt securities and government debt securities			(301	)			4,595				(1,024	)			13,401				(1,325	)			17,996